gnu/dist/gcc4/libstdc++-v3/testsuite/thread/pthread4.cc

   1 // 2002-01-23  Loren J. Rittle <rittle@labs.mot.com> <ljrittle@acm.org>
   2 // Adapted from http://gcc.gnu.org/ml/gcc-bugs/2002-01/msg00679.html
   3 // which was adapted from pthread1.cc by Mike Lu <MLu@dynamicsoft.com>
   4 //
   5 // Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 2, or (at your option)
  11 // any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING.  If not, write to the Free
  20 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  21 // USA.
  22
  23 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-solaris* *-*-cygwin *-*-darwin* alpha*-*-osf* } }
  24 // { dg-options "-pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* alpha*-*-osf* } }
  25 // { dg-options "-pthreads" { target *-*-solaris* } }
  26
  27 #include <string>
  28 #include <list>
  29
  30 // Do not include <pthread.h> explicitly; if threads are properly
  31 // configured for the port, then it is picked up free from STL headers.
  32
  33 using namespace std;
  34
  35 static list<string> foo;
  36 static pthread_mutex_t fooLock = PTHREAD_MUTEX_INITIALIZER;
  37 static pthread_cond_t fooCondOverflow = PTHREAD_COND_INITIALIZER;
  38 static pthread_cond_t fooCondUnderflow = PTHREAD_COND_INITIALIZER;
  39 static unsigned max_size = 10;
  40 #if defined(__CYGWIN__)
  41 static int iters = 10000;
  42 #else
  43 static int iters = 300000;
  44 #endif
  45
  46 void*
  47 produce (void*)
  48 {
  49   for (int num = 0; num < iters; )
  50     {
  51       string str ("test string");
  52
  53       pthread_mutex_lock (&fooLock);
  54       while (foo.size () >= max_size)
  55         pthread_cond_wait (&fooCondOverflow, &fooLock);
  56       foo.push_back (str);
  57       num++;
  58       if (foo.size () >= (max_size / 2))
  59         pthread_cond_signal (&fooCondUnderflow);
  60       pthread_mutex_unlock (&fooLock);
  61     }
  62
  63   // No more data will ever be written, ensure no fini race
  64   pthread_mutex_lock (&fooLock);
  65   pthread_cond_signal (&fooCondUnderflow);
  66   pthread_mutex_unlock (&fooLock);
  67
  68   return 0;
  69 }
  70
  71 void*
  72 consume (void*)
  73 {
  74   for (int num = 0; num < iters; )
  75     {
  76       pthread_mutex_lock (&fooLock);
  77       while (foo.size () == 0)
  78         pthread_cond_wait (&fooCondUnderflow, &fooLock);
  79       while (foo.size () > 0)
  80         {
  81           string str = foo.back ();
  82           foo.pop_back ();
  83           num++;
  84         }
  85       pthread_cond_signal (&fooCondOverflow);
  86       pthread_mutex_unlock (&fooLock);
  87     }
  88
  89   return 0;
  90 }
  91
  92 int
  93 main (void)
  94 {
  95 #if defined(__sun) && defined(__svr4__) && _XOPEN_VERSION >= 500
  96   pthread_setconcurrency (2);
  97 #endif
  98
  99   pthread_t prod;
 100   pthread_create (&prod, NULL, produce, NULL);
 101   pthread_t cons;
 102   pthread_create (&cons, NULL, consume, NULL);
 103
 104   pthread_join (prod, NULL);
 105   pthread_join (cons, NULL);
 106
 107   return 0;
 108 }